Study On Mechanism Of Underwater Adhesion Interface Based On Macro-supramolecular Assembly

Conventional commercial adhesives do not achieve adhesion in water,which greatly limits the range of application of the adhesive.Inspired by creatures such as mussels,research and fabrication of adhesive materials with underwater adhesion has become a hot topic of current research.However,the current research on underwater adhesive materials mainly focuses on improving the adhesion properties of materials and expand the application fields of underwater adhesive materials.Since the adhesion process of mussels is affected by various factors such as chemistry and biology.It is still a huge challenge through the way of bionic mussel adhesion process to study the factors of the adhesion strength of materials and the mechanism of interaction between interfaces during the adhesion process.Currently,macroscopic supramolecular assembly(MSA)is rapidly developing due to cross-disciplinary integration with multiple disciplines.MSA is to use the object of above 10 micrometers as the building blocks,and to modify the supramolecular functional groups on its surface,and to realize the assembly based on multivalent interaction between functional groups by collision.The process of multivalent interaction in MSA is similar to the process of interaction between interfaces in underwater adhesion,which is a process of macroscopic assembly or adhesion through interaction of functional groups on the macroscopic interface.Therefore,in this paper,the problem of "what factors affect the underwater adhesion strength" is to use MSA as a research model.By characterizing the adhesion,it has been clarified that the influence of the adhesion time,the elastic modulus and adhesion load on the effective contact area and the underwater adhesion strength of the building blocks.It is suggested that the effective contact area between the interfaces is the key factor affecting the underwater adhesion strength.Further,the conclusion is extended to other underwater adhesion systems to prove its universality.The main research results are as follows:1.The underwater adhesion system through the interaction between the functional group of the host and guest is designed.It is preliminarily concluded that the effective contact area between the interfaces is the key factor affecting the underwater adhesion strength.2.The underwater adhesion system with catechol as functional groups is constructed,and the universality of the above preliminary conclusions is verified.The factors affecting the underwater adhesion strength are expounded,which provided a new pathway and new model for studying underwater adhesive materials in the future.